TO BE fair, it wasn't like Ki Gayoon's address was a secret.
Everyone in Korea knows Ahjuhyung lives in the richest neighborhood in Seoul.
However…
"How did you get in here, Jeemin-ssi?" Yuno asked, confused and curious. "I thought the security here was tight since the residents are afraid of Ahjuhyung."
"My aunt lives here," Kim Jeemin said. "I visited her."
Aigoo.
"You're brave, Jeemin-ssi," Yuno said while nodding. "You voluntarily entered the monster den just to stalk me. FYI, the rumors about Esper Ki Gayoon-ssi are true— he's really a scary old bastard."
"Are you talking ill behind my back again, you little rusty shit?"
"When did I talk shit behind your back, Ahjuhyung?" Yuno complained when the grumpy old man stood next to him. "I always talk shit in front of you."